Once the beer is poured, the frozen foam, which more or less resembles alcoholic whipped cream, is served at -5 degrees Celsius and can, depending on temperature, act as a makeshift lid for your cup for up to 30 minutes.

We're now aware of this Gift From Above thanks to HardballTalk, who got it from FoodBeast via USA Today, and they're all aware of it because the machine is apparently in use at Dodger Stadium.